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ID 48603
file
creator
Mita, Hajime
Shimoyama, Akira
abstract
Twenty two steranes and 17 triterpanes were detected in the Cretaceous-Tertiary (K/T) boundary sediments at Kawaruppu, Hokkaido, Japan. These steranes and triterpanes were detected at a concentration level of 0.001-0.1nmol g-1. Their concentrations were smaller within the K/T boundary claystone than in the sediments above and below the claystone, which are likely related to the large biomass extinction event at the end of the Cretaceous. The concentrations of 5α-cholestane and the relative ones of 17α,21β-hopane in the sediments above the boundary claystone were about a half of those in the sediments below the claystone, whereas those of 5α-ergostane, 5α-stigmastane, and oleanane in the sediments above were less than a half abundance level of those in the sediments below the claystone. Diastereomer ratios of steranes and triterpanes were nearly constant over the sediments. No tricyclic alkanes were detected in the sediments.
description
This work was supported by the Grant-in-Aid for ScientificResearch (B) No.11440166 from the Ministry of Education, Science, Sports and Culture, Japan and the Research Grant for Fellowship No.00007064 to H. Y. from Japanese Society for the Promotion of Science.
journal title
Researches in Organic Geochemistry
volume
Volume 17
start page
33
end page
43
date of issued
2002-06-30
publisher
The Japanese Association of Organic Geochemists
日本有機地球化学会
issn
1344-9915
2189-7891
1344-9915
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
publisher
rights
Copyright (c) 2002 The Japanese Association of Organic Geochemists
本文データは学協会の許諾に基づきCiNiiから複製したものである
relation url
relation is version of URL
https://ci.nii.ac.jp/naid/110007504571/
department
Graduate School of Science



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